Gears, 4 Sizes - Pack of 80. Polythene gears in 4 diameters: 15mm (12 teeth), 22mm (20 teeth), 32mm (30 teeth) and 40mm (40 teeth). 6mm thick, accepting 3mm shafts except the smallest which accepts a 2mm shaft and therefore push-fits directly onto many miniature motor shafts. Supplied in packs of 80 (20 of each type). Assorted colours.